Jobenschneider



j ficatimin which-` j j j j Figure l,is a view'of the `interior of a lock j `with my improvement applied to it. Fig.` 2,`

is a transverse sectionof the same. j `(fr) (ai) Fig. l, showingthe plane ofsection.

Similar letters of reference indicate cor- H responding parts in the two figures.

` through the casing. l

rEnsrArEs PATENT orricE;

f ,Ionica` soRNEiDER,` or ROCHESTER, NEW YORK.

` .FRLARMATTGHMENT roR DOOR-Locks.

` `Specication of Letters lPatentNo. 12,784, dateldlVIay 1, 1855.

To all whom# concern; ,j

` Be it known that I; JOHN SoriNEmER, of

Rochester, in`1the county of,V Monroe and `State of New York,`"`fhave invented anew and Improved "Alarm ".Attachment for i Locks; andjI do herebydeclarethat the followngis a full,clear, and exact description `of the sa1ne,refer`ence being had to the annexed drawings, making apart of this speci Thisinvention relates to a new and im- `proved alarm `attachment to be applied to locks, and consists in thefemployment `or use of .a small barrel,similar to a pistol barrel,

hammer and lock for operating the same,

)the above parts being constructed, arranged *and supplied to thevlock as will be hereafter fully shown and described. j

. j To enable othersskilled in the art to fully `understand and `construct my invention I will proceed to describe it. j Y

`A `represents the casing of a lock which may be of any f the known forms fConc struction. i

B `represents a i small pistol `barrel which f is inserted in the casingand secured therein inany proper manner. Said barrel is pro- I vided with a cone or nipple (a) which projects through thecasing A, as shown 'in Fig. 1. The muzzle of `the barrel also projects C represents the hammer of the barrel B.

"The inner end of this hammer isprovided i `with Va semi-circular plate (b) through `which a pivot (c) passes, said pivot attach- "Ring the hammerto the `casing andforming a fulcrum on which the hammer` turns or works. The inner `end ofthe hammer 1s also provided with a projection (d) which acts upon the .end of a bent` spring D placed within the casing A,Land constructed simi` "larly to ordinary` gun-lock springs i shownin bothfigures.` c

`E is atumbler which isprovided a `stem or shank (f), oneendl of whichpasses f through the outer sidevof the casing Aand v i has a s'mallknob F secured to it. The stem or shankhasalso a spiral spring (g) around it as `clearly shown in Fig. 2` The tumbler vE has a projection (it) attached to one of its sides, said projection fitting in the key hole Gr ofthe lock.

circular plate (b) and holds the hammer C upward as shown in black Fig. l. The hammer is thencocked. `The hammer C is operated or allowed to fall and explode the cap upon the nipple (0:) by moving laterally the tumbler E. This is done by moving either the projection (k) which fits in the key hole F or by moving the knob F. By moving the tumbler E the projection (h) is drawn out of the notch (e) in the plate (b), and the hammer of course falls. In cooking thehammer the projection on the tumbler is forced into` the notch (e) in the plate (o) by the spring (g).

A burglar in tampering with the lock would move the projection Ut) and consequently the tumbler E, and the hammer C will fall and explode on the nipple (1w) of the barrel B which barrel may be charged with a requisite quantity of powder in order to produce a sufliciently loud report. The knob F may also have a string or chain attached to it which string or chain may also be attachedto the'casing of the door so that.V

if the'door to which the lock is attached be opened, the knob F will be drawn out from the casing and the hammer thereby allowed to fall.

The above invention is extremely simple,

and may be applied to a lock at a small` `JOHN SCHNEIDER.

desire to secure Witnesses:

P. M. CRANDALL, RICHARD E. SCHROEDER.

Thetumbler` it will be seen does not turn 

